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Madaj R, Gostyński B, Chworos A, Cypryk M. Novichok Nerve Agents as Inhibitors of Acetylcholinesterase-In Silico Study of Their Non-Covalent Binding Affinity. Molecules 2024; 29:338. [PMID: 38257251 PMCID: PMC10819560 DOI: 10.3390/molecules29020338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 12/27/2023] [Accepted: 01/08/2024] [Indexed: 01/24/2024] Open
Abstract
In silico studies were performed to assess the binding affinity of selected organophosphorus compounds toward the acetylcholinesterase enzyme (AChE). Quantum mechanical calculations, molecular docking, and molecular dynamics (MD) with molecular mechanics Generalized-Born surface area (MM/GBSA) were applied to assess quantitatively differences between the binding energies of acetylcholine (ACh; the natural agonist of AChE) and neurotoxic, synthetic correlatives (so-called "Novichoks", and selected compounds from the G- and V-series). Several additional quantitative descriptors like root-mean-square fluctuation (RMSF) and the solvent accessible surface area (SASA) were briefly discussed to give-to the best of our knowledge-the first quantitative in silico description of AChE-Novichok non-covalent binding process and thus facilitate the search for an efficient and effective treatment for Novichok intoxication and in a broader sense-intoxication with other warfare nerve agents as well.
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Affiliation(s)
- Rafal Madaj
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland; (R.M.); (A.C.)
- Institute of Evolutionary Biology, Faculty of Biology, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
| | - Bartłomiej Gostyński
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland; (R.M.); (A.C.)
| | - Arkadiusz Chworos
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland; (R.M.); (A.C.)
| | - Marek Cypryk
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland; (R.M.); (A.C.)
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Mizerska U, Rubinsztajn S, Chojnowski J, Cypryk M, Uznanski P, Walkiewicz-Pietrzykowska A, Fortuniak W. Self-Restructuring of Polyhydromethylsiloxanes by the Hydride Transfer Process: A New Approach to the Cross-Linking of Polysiloxanes and to the Fabrication of Thin Polysiloxane Coatings. Materials (Basel) 2022; 15:6981. [PMID: 36234320 PMCID: PMC9570814 DOI: 10.3390/ma15196981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 09/30/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
The branching and cross-linking of siloxane polymers are important processes in silicone technology. A new type of such a process has been developed, which is a self-restructuring of linear polyhydromethylsiloxane (PHMS). This process involves the reorganization of the PHMS to form a highly branched siloxane polymer or finally a cross-linked siloxane network. It occurs through the transfer of a hydride ion between silicon atoms catalyzed by tris(pentafluoromethyl)borane. Its advantage over existing branching and cross-linking reactions is that it runs at room temperature without a low-molecular-weight cross-linker in the absence of water, silanol groups, or other protic compounds and it does not use metal catalysts. The study of this process was carried out in toluene solution. Its course was followed by 1H NMR, 29Si NMR and FTIR, SEC, and gas chromatography. A general mechanism of this new self-restructuring process supported by quantum calculations is proposed. It has been shown that a linear PHMS self-restructured to a highly branched polymer can serve as a pure methylsiloxane film precursor.
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Mikołajczyk M, Cypryk M, Gostyński B, Kowalczewski J. Correction: Mikołajczyk et al. Nucleophilic Substitution at Heteroatoms-Identity Substitution Reactions at Phosphorus and Sulfur Centers: Do They Proceed in a Concerted (SN2) or Stepwise (A-E) Way? Molecules 2022, 27, 599. Molecules 2022; 27:molecules27123820. [PMID: 35745089 PMCID: PMC9227235 DOI: 10.3390/molecules27123820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Accepted: 06/06/2022] [Indexed: 11/16/2022]
Abstract
(1) The authors would like to correct mistakes in the title paper [...].
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Affiliation(s)
- Marian Mikołajczyk
- Department of Organic Chemistry, Centre of Molecular and Macromolecular Studies Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland
- Correspondence: (M.M.); (M.C.); Tel.: +48-42-68-03-221 (M.M.)
| | - Marek Cypryk
- Department of Structural Chemistry, Centre of Molecular and Macromolecular Studies Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland;
- Correspondence: (M.M.); (M.C.); Tel.: +48-42-68-03-221 (M.M.)
| | - Bartłomiej Gostyński
- Department of Structural Chemistry, Centre of Molecular and Macromolecular Studies Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland;
| | - Jakub Kowalczewski
- Faculty of Chemistry, Lodz University of Technology, Żeromskiego 114, 90-543 Łódź, Poland;
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Rubinsztajn S, Chojnowski J, Mizerska U, Basko M, Uznanski P, Walkiewicz-Pietrzykowska A, Cypryk M. Reactions of Zirconium (IV) n-Propoxide with SiH-Functional Polysiloxanes as a Route to Siloxane-Zirconium Hybrid Materials with Enhanced Refractive Index. Macromol Rapid Commun 2020; 42:e2000601. [PMID: 33270347 DOI: 10.1002/marc.202000601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 10/30/2020] [Indexed: 11/11/2022]
Abstract
The reaction of poly(hydromethylsiloxane-co-methylphenylsiloxane) with zirconium (IV) n-propoxide in dry toluene leads to extensive scission of the siloxane chain and conversion of Si-H groups. These processes produce oligomeric siloxanes and organosilanes containing moisture sensitive propoxy and siloxy-zirconate groups. The obtained post-reaction solution of zirconium containing heterosiloxane oligomers is stable under anhydrous conditions for several weeks. However, its exposure to moisture initiates the hydrolytic condensation of the reactive groups leading to cross-linking and the formation of a siloxane-zirconium composite. Spin coating of the siloxane-zirconium prepolymer followed by exposure to moisture produces thin films with excellent light transparency and increased refractive index. The final coatings are characterized by ellipsometry, UV-Vis, IR, and 29 Si MAS NMR spectroscopies.
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Affiliation(s)
- Slawomir Rubinsztajn
- Dr. S. Rubinsztajn, Prof. J. Chojnowski, Dr. U. Mizerska, Dr. M. Basko, Dr. P. Uznanski, Dr. A. Walkiewicz-Pietrzykowska, Prof. M. Cypryk, Centre of Molecular and Macromolecular StudiesPolish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland
| | - Julian Chojnowski
- Dr. S. Rubinsztajn, Prof. J. Chojnowski, Dr. U. Mizerska, Dr. M. Basko, Dr. P. Uznanski, Dr. A. Walkiewicz-Pietrzykowska, Prof. M. Cypryk, Centre of Molecular and Macromolecular StudiesPolish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland
| | - Urszula Mizerska
- Dr. S. Rubinsztajn, Prof. J. Chojnowski, Dr. U. Mizerska, Dr. M. Basko, Dr. P. Uznanski, Dr. A. Walkiewicz-Pietrzykowska, Prof. M. Cypryk, Centre of Molecular and Macromolecular StudiesPolish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland
| | - Malgorzata Basko
- Dr. S. Rubinsztajn, Prof. J. Chojnowski, Dr. U. Mizerska, Dr. M. Basko, Dr. P. Uznanski, Dr. A. Walkiewicz-Pietrzykowska, Prof. M. Cypryk, Centre of Molecular and Macromolecular StudiesPolish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland
| | - Pawel Uznanski
- Dr. S. Rubinsztajn, Prof. J. Chojnowski, Dr. U. Mizerska, Dr. M. Basko, Dr. P. Uznanski, Dr. A. Walkiewicz-Pietrzykowska, Prof. M. Cypryk, Centre of Molecular and Macromolecular StudiesPolish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland
| | - Agnieszka Walkiewicz-Pietrzykowska
- Dr. S. Rubinsztajn, Prof. J. Chojnowski, Dr. U. Mizerska, Dr. M. Basko, Dr. P. Uznanski, Dr. A. Walkiewicz-Pietrzykowska, Prof. M. Cypryk, Centre of Molecular and Macromolecular StudiesPolish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland
| | - Marek Cypryk
- Dr. S. Rubinsztajn, Prof. J. Chojnowski, Dr. U. Mizerska, Dr. M. Basko, Dr. P. Uznanski, Dr. A. Walkiewicz-Pietrzykowska, Prof. M. Cypryk, Centre of Molecular and Macromolecular StudiesPolish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland
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Wirwis A, Mizerska U, Cypryk M, Trzeciak A. The Heck synthesis of β‐arylated ketones catalyzed by palladium immobilized on functional polysiloxane microspheres. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- A. Wirwis
- Faculty of Chemistry University of Wrocław 14 F. Joliot‐Curie Wrocław 50‐383 Poland
| | - U. Mizerska
- Centre of Molecular and Macromolecular Studies Polish Academy of Sciences, Engineering of Polymer Materials 112 Sienkiewicza Lodz 90‐363 Poland
| | - M. Cypryk
- Centre of Molecular and Macromolecular Studies Polish Academy of Sciences, Engineering of Polymer Materials 112 Sienkiewicza Lodz 90‐363 Poland
| | - A.M. Trzeciak
- Faculty of Chemistry University of Wrocław 14 F. Joliot‐Curie Wrocław 50‐383 Poland
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Rubinsztajn S, Mizerska U, Zakrzewska J, Uznanski P, Cypryk M, Fortuniak W. Effect of temperature on B(C 6F 5) 3-catalysed reduction of germanium alkoxides by hydrosilanes - a new route to germanium nanoparticles. Dalton Trans 2020; 49:7319-7323. [PMID: 32478766 DOI: 10.1039/d0dt01555e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reduction of Ge(OBu)4 with PhMe2SiH catalyzed by B(C6F5)3 at ambient temperature leads to GeH4. We discovered that a higher temperature (above 100 °C) completely changes the reaction course by producing germanium nanoparticles (Ge NPs) in high yield. This process provides a simple one-pot method for Ge NPs synthesis from readily available substrates under mild conditions.
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Affiliation(s)
- Slawomir Rubinsztajn
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland.
| | - Urszula Mizerska
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland.
| | - Joanna Zakrzewska
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland.
| | - Pawel Uznanski
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland.
| | - Marek Cypryk
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland.
| | - Witold Fortuniak
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland.
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Rubinsztajn S, Chojnowski J, Cypryk M, Mizerska U, Uznański P, Walkiewicz‐Pietrzykowska A. Reactions of titanium alkoxide with SiH containing polymers as a route to titanium/siloxane hybrid materials with enhanced refractive index. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5571] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Slawomir Rubinsztajn
- Centre of Molecular and Macromolecular StudiesPolish Academy of Sciences Sienkiewicza 112 90‐363 Łódź Poland
| | - Julian Chojnowski
- Centre of Molecular and Macromolecular StudiesPolish Academy of Sciences Sienkiewicza 112 90‐363 Łódź Poland
| | - Marek Cypryk
- Centre of Molecular and Macromolecular StudiesPolish Academy of Sciences Sienkiewicza 112 90‐363 Łódź Poland
| | - Urszula Mizerska
- Centre of Molecular and Macromolecular StudiesPolish Academy of Sciences Sienkiewicza 112 90‐363 Łódź Poland
| | - Pawel Uznański
- Centre of Molecular and Macromolecular StudiesPolish Academy of Sciences Sienkiewicza 112 90‐363 Łódź Poland
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Piorecka K, Kurjata J, Bak-Sypien I, Cypryk M, Steinke U, Stanczyk WA. Reasons for enhanced activity of doxorubicin on co-delivery with octa(3-aminopropyl)silsesquioxane. RSC Adv 2020; 10:15579-15585. [PMID: 35495453 PMCID: PMC9052520 DOI: 10.1039/d0ra01319f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 04/13/2020] [Indexed: 11/21/2022] Open
Abstract
This paper presents results of spectroscopic (NMR, FTIR, fluorescence), Q-TOF mass spectrometry and Z-potential analyses of interactions between octa(3-aminopropyl)silsesquioxane hydrochloride (POSS-NH2·HCl) and anticancer drug – doxorubicin hydrochloride. These studies aimed at explanation of the enhanced activity of doxorubicin on co-delivery with POSS-NH2. The results point to the formation of active complexes via ionic interactions between the ammonium chloride groups of silsesquioxane and the drug, and not, as suggested earlier, via NH⋯N hydrogen bonding. It has also been shown that the main driving force for the formation of the complexes can be strengthened by π–π stacking and hydrogen bonds. The experimental results are supported by quantum mechanical calculations. This work has proven that co-delivery with POSS offers a potentially advantageous and simple approach for improved efficacy in chemotherapy, avoiding often complicated synthesis of conjugates, involving covalent bonding between drug, nanocarrier and targeting agents. The interaction between polyhedral oligomeric silsesquioxane (POSS) and doxorubicin, leading to formation of active complexes involving POSS functional aminopropyl groups and anthracycline functional groups.![]()
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Affiliation(s)
- Kinga Piorecka
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences Sienkiewicza 112 90-363 Lodz Poland +48-42-6803-203
| | - Jan Kurjata
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences Sienkiewicza 112 90-363 Lodz Poland +48-42-6803-203
| | - Irena Bak-Sypien
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences Sienkiewicza 112 90-363 Lodz Poland +48-42-6803-203
| | - Marek Cypryk
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences Sienkiewicza 112 90-363 Lodz Poland +48-42-6803-203
| | - Urszula Steinke
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences Sienkiewicza 112 90-363 Lodz Poland +48-42-6803-203
| | - Wlodzimierz A Stanczyk
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences Sienkiewicza 112 90-363 Lodz Poland +48-42-6803-203
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Mikołajczyk M, Gajl M, Błaszczyk J, Cypryk M, Gostyński B. Nucleophilic Substitution at Tetracoordinate Sulfur. Kinetics and Mechanism of the Chloride-Chloride Exchange Reaction in Arenesulfonyl Chlorides: Counterintuitive Acceleration of Substitution at Sulfonyl Sulfur by ortho-Alkyl Groups and Its Origin. Molecules 2020; 25:molecules25061428. [PMID: 32245137 PMCID: PMC7144404 DOI: 10.3390/molecules25061428] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 03/16/2020] [Accepted: 03/18/2020] [Indexed: 11/16/2022] Open
Abstract
The chloride-chloride exchange reaction in arenesulfonyl chlorides was investigated experimentally and theoretically by density functional theory (DFT) calculations. The second order rate constants and activation parameters of this identity reaction were determined for 22 variously substituted arenesulfonyl chlorides using radio-labeled Et4N36Cl. The chloride exchange rates of 11 sulfonyl chlorides bearing para-and meta-substituents (σ constants from -0.66 to +0.43) in the aromatic ring followed the Hammett equation with a ρ-value of +2.02. The mono- and di-ortho-alkyl substituted sulfonyl chlorides exhibit an enhanced reactivity although both inductive and steric effects lower the reaction rate. The DFT calculations of their structures together with X-ray data showed that an increased reactivity is mainly due to a peculiar, rigid, strongly compressed and sterically congested structure. The DFT studies of the title reaction revealed that it proceeds via a single transition state according to the SN2 mechanism. The analogous fluoride exchange reaction occurs according to the addition-elimination mechanism (A-E) and formation of a difluorosulfurandioxide intermediate. The reliability of the calculations performed was supported by the fact that the calculated relative rate constants and activation parameters correlate well with the experimental kinetic data.
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Affiliation(s)
- Marian Mikołajczyk
- Department of Organic Chemistry, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Lodz, 112 Sienkiewicza, Poland; (M.G.); (J.B.)
- Correspondence: (M.M.); (M.C.); Tel.: +48-42-68-03-221 (M.M.)
| | - Monika Gajl
- Department of Organic Chemistry, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Lodz, 112 Sienkiewicza, Poland; (M.G.); (J.B.)
| | - Jarosław Błaszczyk
- Department of Organic Chemistry, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Lodz, 112 Sienkiewicza, Poland; (M.G.); (J.B.)
| | - Marek Cypryk
- Department of Structural Chemistry, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Lodz, 112 Sienkiewicza, Poland;
- Correspondence: (M.M.); (M.C.); Tel.: +48-42-68-03-221 (M.M.)
| | - Bartłomiej Gostyński
- Department of Structural Chemistry, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Lodz, 112 Sienkiewicza, Poland;
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Rubinsztajn S, Chojnowski J, Cypryk M, Mizerska U, Fortuniak W, Bak-Sypien II. Kinetic and mechanistic studies of the transformation of the catalyst, tris(pentafluorophenyl)borane, in the presence of silyl and germyl hydrides. J Catal 2019. [DOI: 10.1016/j.jcat.2019.09.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abstract
A DFT study showed competition between basic and nucleophilic catalysis of alkoxysilane hydrolysis by the fluoride ion.
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Affiliation(s)
- Marek Cypryk
- Centre of Molecular and Macromolecular Studies
- Polish Academy of Sciences
- Lodz 90-363
- Poland
| | - Bartłomiej Gostyński
- Centre of Molecular and Macromolecular Studies
- Polish Academy of Sciences
- Lodz 90-363
- Poland
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Rubinsztajn S, Cypryk M, Chojnowski J, Fortuniak W, Mizerska U, Pospiech P. Reaction of Silyl Hydrides with Tetrabutoxygermanium in the Presence of B(C6F5)3: Difference between Silicon and Germanium Chemistries and Easy Route to GeH4. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00156] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Slawomir Rubinsztajn
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Marek Cypryk
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Julian Chojnowski
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Witold Fortuniak
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Urszula Mizerska
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Piotr Pospiech
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
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Krasiński G, Cypryk M, Kwiatkowska M, Mikołajczyk M, Kiełbasiński P. Corrigendum to "Molecular modeling of the lipase-catalyzed hydrolysis of acetoxymethyl(i-propoxy)phenylphosphine oxide and its P-borane analogue" [J. Mol. Graph. Model. 38 (2012) 290-297]. J Mol Graph Model 2017; 78:245. [PMID: 29153278 DOI: 10.1016/j.jmgm.2017.11.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Grzegorz Krasiński
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland
| | - Marek Cypryk
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland.
| | - Małgorzata Kwiatkowska
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland
| | - Marian Mikołajczyk
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland
| | - Piotr Kiełbasiński
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland
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Sochacka E, Lodyga-Chruscinska E, Pawlak J, Cypryk M, Bartos P, Ebenryter-Olbinska K, Leszczynska G, Nawrot B. C5-substituents of uridines and 2-thiouridines present at the wobble position of tRNA determine the formation of their keto-enol or zwitterionic forms - a factor important for accuracy of reading of guanosine at the 3΄-end of the mRNA codons. Nucleic Acids Res 2017; 45:4825-4836. [PMID: 28088758 PMCID: PMC5416851 DOI: 10.1093/nar/gkw1347] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 12/30/2016] [Indexed: 12/19/2022] Open
Abstract
Modified nucleosides present in the wobble position of the tRNA anticodons regulate protein translation through tuning the reading of mRNA codons. Among 40 of such nucleosides, there are modified uridines containing either a sulfur atom at the C2 position and/or a substituent at the C5 position of the nucleobase ring. It is already evidenced that tRNAs with 2-thiouridines at the wobble position preferentially read NNA codons, while the reading mode of the NNG codons by R5U/R5S2U-containing anticodons is still elusive. For a series of 18 modified uridines and 2-thiouridines, we determined the pKa values and demonstrated that both modifying elements alter the electron density of the uracil ring and modulate the acidity of their N3H proton. In aqueous solutions at physiological pH the 2-thiouridines containing aminoalkyl C5-substituents are ionized in ca. 50%. The results, confirmed also by theoretical calculations, indicate that the preferential binding of the modified units bearing non-ionizable 5-substituents to guanosine in the NNG codons may obey the alternative C-G-like (Watson–Crick) mode, while binding of those bearing aminoalkyl C5-substituents (protonated under physiological conditions) and especially those with a sulfur atom at the C2 position, adopt a zwitterionic form and interact with guanosine via a ‘new wobble’ pattern.
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Affiliation(s)
- Elzbieta Sochacka
- Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Elzbieta Lodyga-Chruscinska
- Institute of General Food Chemistry, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Justyna Pawlak
- Institute of General Food Chemistry, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Marek Cypryk
- Department of Bioorganic Chemistry, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Paulina Bartos
- Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Katarzyna Ebenryter-Olbinska
- Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.,Department of Computer Modeling, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Grazyna Leszczynska
- Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Barbara Nawrot
- Department of Computer Modeling, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
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Szymanski R, Sosnowski S, Cypryk M. Steady State and Equilibrium in Reversible Copolymerization at Constant Comonomer Concentrations. MACROMOL THEOR SIMUL 2017. [DOI: 10.1002/mats.201700039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- R. Szymanski
- Centre of Molecular and Macromolecular Studies; Polish Academy of Sciences; Sienkiewicza 112 90-363 Lodz Poland
| | - S. Sosnowski
- Centre of Molecular and Macromolecular Studies; Polish Academy of Sciences; Sienkiewicza 112 90-363 Lodz Poland
| | - M. Cypryk
- Centre of Molecular and Macromolecular Studies; Polish Academy of Sciences; Sienkiewicza 112 90-363 Lodz Poland
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16
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Cypryk M, Drabowicz J, Gostynski B, Kudzin MH, Kudzin ZH, Urbaniak P. 1-( N-Acylamino)alkylphosphonic acids—Deacylation in aqueous solutions. PHOSPHORUS SULFUR 2017. [DOI: 10.1080/10426507.2017.1286494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Marek Cypryk
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Lodz, Poland
| | - Jozef Drabowicz
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Lodz, Poland
- Department of Chemistry, Environment Protection and Biotechnology, Jan Dlugosz University, Czestochowa, Poland
| | - Bartlomiej Gostynski
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Lodz, Poland
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17
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Lapienis G, Szymanski R, Cypryk M. Unexpected formation of a significant amount of polymer primary hydroxyl groups in synthesis of star-shaped polymer from linear alcoholate chains and diepoxides. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.07.062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Zawartka W, Pośpiech P, Cypryk M, Trzeciak AM. Carbonylative Suzuki–Miyaura coupling catalyzed by palladium supported on aminopropyl polymethylsiloxane microspheres under atmospheric pressure of CO. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2016.03.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Midura WH, Cypryk M, Rzewnicka A, Krysiak JA, Sieroń L. Stereoselective Cyclopropanation as a Way to 1-Aminocyclopropane-1-phosphonic Acids: Rationale for Phosphoryl Group Migration. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600111] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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21
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Szymanski R, Sosnowski S, Cypryk M. Evolution of Chain Microstructure and Kinetics of Reaching Equilibrium in Living Reversible Copolymerization. MACROMOL THEOR SIMUL 2016. [DOI: 10.1002/mats.201500047] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ryszard Szymanski
- Center of Molecular and Macromolecular Studies; Sienkiewicza 112 Lodz 90-363 Poland
| | - Stanislaw Sosnowski
- Center of Molecular and Macromolecular Studies; Sienkiewicza 112 Lodz 90-363 Poland
| | - Marek Cypryk
- Center of Molecular and Macromolecular Studies; Sienkiewicza 112 Lodz 90-363 Poland
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22
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Sienkiewicz N, Strzelec K, Pospiech P, Cypryk M, Szmechtyk T. New palladium catalyst immobilized on epoxy resin: synthesis, characterization and catalytic activity. Appl Organomet Chem 2015. [DOI: 10.1002/aoc.3389] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Natalia Sienkiewicz
- Institute of Polymer and Dye Technology, Faculty of Chemistry; Lodz University of Technology; Stefanowskiego 12/16 90-924 Lodz Poland
| | - Krzysztof Strzelec
- Institute of Polymer and Dye Technology, Faculty of Chemistry; Lodz University of Technology; Stefanowskiego 12/16 90-924 Lodz Poland
| | - Piotr Pospiech
- Center of Molecular and Macromolecular Studies; Polish Academy of Sciences; Sienkiewicza 112 90-363 Lodz Poland
| | - Marek Cypryk
- Center of Molecular and Macromolecular Studies; Polish Academy of Sciences; Sienkiewicza 112 90-363 Lodz Poland
| | - Tomasz Szmechtyk
- Institute of Polymer and Dye Technology, Faculty of Chemistry; Lodz University of Technology; Stefanowskiego 12/16 90-924 Lodz Poland
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23
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Zawartka W, Pośpiech P, Cypryk M, Trzeciak AM. Palladium supported on aminopropyl-functionalized polymethylsiloxane microspheres: Simple and effective catalyst for the Suzuki–Miyaura C–C coupling. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2015.07.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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24
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Sochacka E, Szczepanowski RH, Cypryk M, Sobczak M, Janicka M, Kraszewska K, Bartos P, Chwialkowska A, Nawrot B. 2-Thiouracil deprived of thiocarbonyl function preferentially base pairs with guanine rather than adenine in RNA and DNA duplexes. Nucleic Acids Res 2015; 43:2499-512. [PMID: 25690900 PMCID: PMC4357714 DOI: 10.1093/nar/gkv109] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
2-Thiouracil-containing nucleosides are essential modified units of natural and synthetic nucleic acids. In particular, the 5-substituted-2-thiouridines (S2Us) present in tRNA play an important role in tuning the translation process through codon–anticodon interactions. The enhanced thermodynamic stability of S2U-containing RNA duplexes and the preferred S2U-A versus S2U-G base pairing are appreciated characteristics of S2U-modified molecular probes. Recently, we have demonstrated that 2-thiouridine (alone or within an RNA chain) is predominantly transformed under oxidative stress conditions to 4-pyrimidinone riboside (H2U) and not to uridine. Due to the important biological functions and various biotechnological applications for sulfur-containing nucleic acids, we compared the thermodynamic stabilities of duplexes containing desulfured products with those of 2-thiouracil-modified RNA and DNA duplexes. Differential scanning calorimetry experiments and theoretical calculations demonstrate that upon 2-thiouracil desulfuration to 4-pyrimidinone, the preferred base pairing of S2U with adenosine is lost, with preferred base pairing with guanosine observed instead. Therefore, biological processes and in vitro assays in which oxidative desulfuration of 2-thiouracil-containing components occurs may be altered. Moreover, we propose that the H2U-G base pair is a suitable model for investigation of the preferred recognition of 3′-G-ending versus A-ending codons by tRNA wobble nucleosides, which may adopt a 4-pyrimidinone-type structural motif.
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Affiliation(s)
- Elzbieta Sochacka
- Institute of Organic Chemistry, Technical University of Lodz, Zeromskiego 116, 90-924 Lodz, Poland
| | - Roman H Szczepanowski
- International Institute of Molecular and Cell Biology, Ks. J. Trojdena 4, 02-109 Warsaw, Poland
| | - Marek Cypryk
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Milena Sobczak
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Magdalena Janicka
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Karina Kraszewska
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Paulina Bartos
- Institute of Organic Chemistry, Technical University of Lodz, Zeromskiego 116, 90-924 Lodz, Poland
| | - Anna Chwialkowska
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Barbara Nawrot
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
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25
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Drabik E, Krasiński G, Cypryk M, Błaszczyk R, Gajda T, Sochacki M. Differentiation of diastereoisomers of protected 1,2-diaminoalkylphosphonic acids by EI mass spectrometry and density functional theory. J Am Soc Mass Spectrom 2013; 24:388-398. [PMID: 23393058 PMCID: PMC3586168 DOI: 10.1007/s13361-012-0556-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Revised: 11/28/2012] [Accepted: 11/29/2012] [Indexed: 06/01/2023]
Abstract
Electron ionization mass spectrometry and density functional theory (DFT) calculations have been used to study the fragmentation of diastereoisomers of protected 1,2-diaminoalkylphosphonic acids. The loss of a diethoxyphosphoryl group and the elimination of diethyl phosphonate were found to be competitive fragmentation processes, which can be used to differentiate both stereoisomers. Selective deuterated analogs and product- and precursor-ion mass spectra allowed the elucidation of the fragmentation mechanisms. The structures of the transition states and product ions were optimized using the density functional theory (DFT), and free energy calculations confirmed the observed differences in the formation and relative intensities of specific fragment ions.
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Affiliation(s)
- Ewelina Drabik
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Laboratory for Analysis of Organic Compounds and Polymers, Łódź, Poland.
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26
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Krasiński G, Cypryk M, Kwiatkowska M, Mikołajczyk M, Kiełbasiński P. Molecular modeling of the lipase-catalyzed hydrolysis of acetoxymethyl(i-propoxy)phenylphosphine oxide and its P-borane analogue. J Mol Graph Model 2012; 38:290-7. [DOI: 10.1016/j.jmgm.2012.09.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2011] [Revised: 08/31/2012] [Accepted: 09/03/2012] [Indexed: 11/25/2022]
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27
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Cypryk M, Krasiński G, Mikołajczyk M. Structure and reactivity of thiosulfonic acids and their anions: A theoretical study. Heteroatom Chem 2012. [DOI: 10.1002/hc.21021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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28
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Strzelec K, Wąsikowska K, Cypryk M, Pospiech P. Terpolymers of N-vinylpyrrolidinone and 1-vinylimidazole as new supports for palladium nanocluster catalysts. e-Polymers 2011. [DOI: 10.1515/epoly.2011.11.1.270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractTwo terpolymers of styrene, divinylbenzene, and 1-vinylimidazole (S/DVB/VI) or N-vinylpyrrolidinone (S/DVB/NVP) were prepared by radical polymerization. Palladium nanoparticle catalyst has been “heterogenized” by anchoring to these polymers the [PdCl2(PhCN)2] complex via ligand exchange reaction. The formation of coordination bond between S/DVB/VI, S/DVB/NVP terpolymers and Pd2+ ions was studied using infrared and XPS. Immobilized palladium complex was reduced during hydrogenation reaction or by reaction with sodium borohydride. Characterization of polymer supports and palladium catalysts has involved the measurements of the structural parameters in the dry state by the nitrogen BET adsorption, X-ray photoelectron spectroscopy (XPS), AAS spectroscopy and time-of-flight secondary ion mass spectrometry (TOF-SIMS). Both the catalytic systems were found efficient in the hydrogenation of cinnamaldehyde. The stability and a good recycling efficiency of these catalysts make them useful for prolonged use. The factors influencing selectivity of supported catalysts were discussed. The results offer the possibility of using these terpolymers for the immobilization of metal complex catalysts for hydrogenation and other catalytic reactions.
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Affiliation(s)
- Krzysztof Strzelec
- 1Institute of Polymer & Dye Technology, Technical University of Łódź, Stefanowskiego 12/16, 90-924 Łódź, Poland
| | - Karolina Wąsikowska
- 1Institute of Polymer & Dye Technology, Technical University of Łódź, Stefanowskiego 12/16, 90-924 Łódź, Poland
| | - Marek Cypryk
- 2Center of Molecular and Macromolecular Studies, Polish Academy of Sciences,Sienkiewicza 112, 90-363 Łódź, Poland
| | - Piotr Pospiech
- 2Center of Molecular and Macromolecular Studies, Polish Academy of Sciences,Sienkiewicza 112, 90-363 Łódź, Poland
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29
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Strzelec K, Wąsikowska K, Cypryk M, Pospiech P. Rhodium(I) complex catalyst immobilized on terpolymers of N-vinylpyrrolidinone and 1-vinylimidazole. J Appl Polym Sci 2011. [DOI: 10.1002/app.35521] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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30
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Borkowski T, Zawartka W, Pospiech P, Mizerska U, Trzeciak A, Cypryk M, Tylus W. Reusable functionalized polysiloxane-supported palladium catalyst for Suzuki–Miyaura cross-coupling. J Catal 2011. [DOI: 10.1016/j.jcat.2011.06.023] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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31
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Kwiatkowska M, Krasiński G, Cypryk M, Cierpiał T, Kiełbasiński P. Lipase-mediated stereoselective transformations of chiral organophosphorus P-boranes revisited: revision of the absolute configuration of alkoxy(hydroxymethyl)phenylphosphine P-boranes. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.08.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Cypryk M, Chrusciel J, Fossum E, Matyjaszewski K. Ring-opening polymerization of strained cyclotetrasilanes as a new route towards well defined polysilylenes. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.19930730116] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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34
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Owsianik K, Chauvin R, Balińska A, Wieczorek M, Cypryk M, Mikołajczyk M. Boronation of 1,8-Bis(diphenylphosphino)naphthalene: Formation of Cyclic Boronium Salts. Organometallics 2009. [DOI: 10.1021/om900017n] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Krzysztof Owsianik
- Centre of Molecular and Macromolecular Studies, Department of Heteroorganic Chemistry, Polish Academy of Sciences, 90-363 Łódź, Sienkiewicza 112, Poland
| | - Remi Chauvin
- Laboratoire de Chimie de Coordination CNRS, 205 Route de Narbonne, 31077 Toulouse Cedex 4, France
| | - Agnieszka Balińska
- Institute of Chemistry and Environmental Protection, Jan Długosz Academy, 42-200 Czȩstochowa, Al. Armii Krajowej 13/15, Poland
| | - Michał Wieczorek
- Institute of Chemistry and Environmental Protection, Jan Długosz Academy, 42-200 Czȩstochowa, Al. Armii Krajowej 13/15, Poland
| | - Marek Cypryk
- Centre of Molecular and Macromolecular Studies, Department of Heteroorganic Chemistry, Polish Academy of Sciences, 90-363 Łódź, Sienkiewicza 112, Poland
| | - Marian Mikołajczyk
- Centre of Molecular and Macromolecular Studies, Department of Heteroorganic Chemistry, Polish Academy of Sciences, 90-363 Łódź, Sienkiewicza 112, Poland
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Affiliation(s)
- Marek Cypryk
- a Center of Molecular and Macromolecular Studies , Polish Academy of Sciences , Łódź, Poland
| | - Piotr Pospiech
- a Center of Molecular and Macromolecular Studies , Polish Academy of Sciences , Łódź, Poland
| | | | - Janusz W. Sobczak
- c Institute of Physical Chemistry, Polish Academy of Sciences , Warsaw, Poland
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36
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Dabkowski W, Ozarek A, Olejniczak S, Cypryk M, Chojnowski J, Michalski J. Studies on the Efficient Generation of PhosphorusCarbon Bonds via a Rearrangement of PIIIEsters Catalysed by Trimethylhalosilanes. Chemistry 2009; 15:1747-56. [DOI: 10.1002/chem.200800435] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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37
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Cypryk M, Delczyk B, Juhari A, Koynov K. Controlled synthesis of trifluoropropylmethylsiloxane–dimethylsiloxane gradient copolymers by anionic ROP of cyclotrisiloxanes. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pola.23227] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Marek Cypryk
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90‐363 Łódź, Poland
| | - BogumiŁa Delczyk
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90‐363 Łódź, Poland
| | - Azhar Juhari
- Department of Physics of Polymers, Max Planck Institute for Polymer Research, Ackermannweg 10, D‐55128 Mainz, Germany
| | - Kaloian Koynov
- Department of Physics of Polymers, Max Planck Institute for Polymer Research, Ackermannweg 10, D‐55128 Mainz, Germany
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Schirrmacher E, Wängler B, Cypryk M, Bradtmöller G, Schäfer M, Eisenhut M, Jurkschat K, Schirrmacher R. Synthesis of p-(di-tert-butyl[(18)F]fluorosilyl)benzaldehyde ([(18)F]SiFA-A) with high specific activity by isotopic exchange: a convenient labeling synthon for the (18)F-labeling of N-amino-oxy derivatized peptides. Bioconjug Chem 2007; 18:2085-9. [PMID: 18030993 DOI: 10.1021/bc700195y] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The syntheses of different (18)F-labeled peptides using the highly effective labeling synthon p-(di- tert-butylfluorosilyl) benzaldehyde ([ (18)F]SiFA-A) for the development of (18)F-radiopharmaceuticals for oncological positron emission tomography (PET) is reported. The novel and mild labeling technique for the radiosynthesis of [ (18)F]SiFA-A, based on an unexpectedly efficient isotopic (19)F- (18)F exchange, yielded the (18)F-synthon [ (18)F]SiFA-A in almost quantitative yields in high specific activities between 225 and 680 GBq/micromol (6081-18 378 Ci/mmol) without applying HPLC purification. The [ (18)F]SiFA-A was finally used to label the N-terminal amino-oxy (N-AO) derivatized peptides AO-Tyr (3)-octreotate (AO-TATE), cyclo(fK(AO-N)RGD and N-AO-PEG 2-[D-Tyr-Gln-Trp-Ala-Val-betaAla-His-Thi-Nle-NH 2] (AO-BZH3, a bombesin derivative) in high radiochemical yields. Density functional theory (DFT) calculations confirmed high efficiency of the isotopic exchange, which is predicted to proceed via a pentacoordinate siliconate intermediate dissociating immediately to form the radiolabeled [ (18)F]SiFA-A.
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Affiliation(s)
- Esther Schirrmacher
- Lady Davis Institute, Jewish General Hospital, and Montreal Neurological Institute, McGill University, Montreal, Canada.
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Buchalski P, Cypryk M, Lipkowski J, Pasynkiewicz S, Pietrzykowski A. Novel tetrahedral tetranickel cluster with alkylidyne ligand (NiCp)4(μ3-CR). J Organomet Chem 2006. [DOI: 10.1016/j.jorganchem.2006.09.042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Díaz Gómez E, Albert D, Mattiza J, Duddeck H, Chojnowski J, Cypryk M. Enantiodifferentiation of a silane and the analogous hydrocarbon by the dirhodium method—silane⋯dirhodium complex interaction. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.tetasy.2006.05.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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41
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Nawrot B, Sobczak M, Wójcik M, Janicka M, Nowak M, Cypryk M, Stec WJ. A novel class of DNA analogs bearing 5'-C-phosphonothymidine units: synthesis and physicochemical and biochemical properties. Oligonucleotides 2006; 16:68-82. [PMID: 16584296 DOI: 10.1089/oli.2006.16.68] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
S(C) and R(C) diastereomers of 5'-C-(O,O-diethyl)-phosphonylthymidine ((R)T and (S)T) were used for the synthesis of the dimers T(R)T and T(S)T, respectively. These dimers were incorporated at selected sites in oligonucleotide constructs. Melting temperature (Tm) experiments demonstrated that relative to the unmodified oligodeoxyribonucleotide, the presence of the (R)T moiety reduced the thermal stability of the duplexes by approximately 5.0 degrees C per modification, whereas their (S)T counterparts only slightly destabilized the duplex structure (deltaTm < or = 1 degree C/modification). The stability of the triple-helical complexes containing one, two, or three modified thymidines is slightly higher than that of the parent complex. Nuclease resistance studies performed with snake venom phosphodiesterase, calf spleen phosphodiesterase, and 3'-exonuclease from human plasma showed that cleavage of the oligonucleotides at the site of the modification was completely suppressed regardless of the stereochemistry of the 5'-C-chiral center. The influence of the (R)T and (S)T modification in the recognition sequence of HindIII, EcoRI, and HpaI restriction endonucleases was also investigated. Although the catalytic activity of HindIII was not affected by the presence of the 5'-C-ethoxyphosphonyl modification, the activities of the two remaining restriction enzymes were partially suppressed depending on the site of modification or the stereochemistry of the modification or both ((R)T vs. (S)T).
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Affiliation(s)
- Barbara Nawrot
- Department of Bioorganic Chemistry, Centre of Molecular and Macromolecular Studies of Polish Academy of Sciences, 90-363 Lodz, Poland.
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Abstract
Hydrolysis and condensation of simple trifluorosilanes, HSiF3 and MeSiF3, was studied by quantum mechanical methods. Hydrolysis of fluorosilanes is highly endothermic. The Gibbs free energy of the first reaction step in the gas phase is 31.4 kJ/mol, which corresponds to an equilibrium constant of 10(-6). Hydrolysis of the subsequent fluorine atoms in trifluorosilanes is thermodynamically more unfavorable than the first step of substitution. No significant difference in thermodynamics of hydrolysis was found between HSiF3 and MeSiF3. The activation energy for hydrolysis by a water dimer is significantly lower than that for hydrolysis by a water monomer. The former reaction is also less unfavorable thermodynamically, due to a high binding energy of the HF-H2O complex formed as a product of hydrolysis. Self-consistent reaction field (SCRF) calculations show that hydrolysis of trifluorosilanes in aqueous medium has lower activation energy than in the gas phase. It is also thermodynamically less unfavorable, due to better solvation of the products. Homofunctional condensation of HSiF2OH is thermodynamically favored. The equilibrium mixture for hydrolysis/condensation of RSiF3 in water is predicted to contain ca. 2.3% disiloxane (HF2Si)2O, if 100-fold excess of water relative to silane is assumed. Further hydrolysis of (HF2Si)2O is negligible. The thermodynamics of fluorosilane hydrolysis contrasts with that of chlorosilanes, where both hydrolysis and condensation are strongly favorable. Moreover, in the case of trichlorosilanes each subsequent hydrolysis step is more facile, leading to the product of full hydrolysis, RSi(OH)3.
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Affiliation(s)
- Marek Cypryk
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Łódź, Sienkiewicza 112, Poland.
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Chojnowski J, Rubinsztajn S, Cella JA, Fortuniak W, Cypryk M, Kurjata J, Kaźmierski K. Mechanism of the B(C6F5)3-Catalyzed Reaction of Silyl Hydrides with Alkoxysilanes. Kinetic and Spectroscopic Studies. Organometallics 2005. [DOI: 10.1021/om050563p] [Citation(s) in RCA: 137] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Julian Chojnowski
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland, and General Electric Company, Global Research Center, Niskayuna, New York 12309
| | - Sławomir Rubinsztajn
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland, and General Electric Company, Global Research Center, Niskayuna, New York 12309
| | - James A. Cella
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland, and General Electric Company, Global Research Center, Niskayuna, New York 12309
| | - Witold Fortuniak
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland, and General Electric Company, Global Research Center, Niskayuna, New York 12309
| | - Marek Cypryk
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland, and General Electric Company, Global Research Center, Niskayuna, New York 12309
| | - Jan Kurjata
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland, and General Electric Company, Global Research Center, Niskayuna, New York 12309
| | - Krzysztof Kaźmierski
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland, and General Electric Company, Global Research Center, Niskayuna, New York 12309
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Kowalski A, Libiszowski J, Biela T, Cypryk M, Duda A, Penczek S. Kinetics and Mechanism of Cyclic Esters Polymerization Initiated with Tin(II) Octoate. Polymerization of ε-Caprolactone and l,l-Lactide Co-initiated with Primary Amines. Macromolecules 2005. [DOI: 10.1021/ma050752j] [Citation(s) in RCA: 153] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Adam Kowalski
- Department of Polymer Chemistry, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Lodz, Sienkiewicza 112, Poland
| | - Jan Libiszowski
- Department of Polymer Chemistry, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Lodz, Sienkiewicza 112, Poland
| | - Tadeusz Biela
- Department of Polymer Chemistry, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Lodz, Sienkiewicza 112, Poland
| | - Marek Cypryk
- Department of Polymer Chemistry, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Lodz, Sienkiewicza 112, Poland
| | - Andrzej Duda
- Department of Polymer Chemistry, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Lodz, Sienkiewicza 112, Poland
| | - Stanislaw Penczek
- Department of Polymer Chemistry, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Lodz, Sienkiewicza 112, Poland
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Midura W, Krysiak J, Cypryk M, Miko?ajczyk M, Wieczorek M, Filipczak A. Asymmetric Cyclopropanation of Optically Active (1-Diethoxyphosphoryl)vinylp-Tolyl Sulfoxide with Sulfur Ylides: A Rationale for Diastereoselectivity. European J Org Chem 2005. [DOI: 10.1002/ejoc.200400587] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Midura W, Krysiak J, Cypryk M, Miko?ajczyk M, Wieczorek M, Filipczak A. Cover Picture: Asymmetric Cyclopropanation of Optically Active (1-Diethoxyphosphoryl)vinylp-Tolyl Sulfoxide with Sulfur Ylides: A Rationale for Diastereoselectivity (Eur. J. Org. Chem. 4/2005). European J Org Chem 2005. [DOI: 10.1002/ejoc.200590008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Grzelka A, Chojnowski J, Cypryk M, Fortuniak W, Hupfield PC, Taylor RG. Polysiloxanol condensation and disproportionation in the presence of a superacid. J Organomet Chem 2004. [DOI: 10.1016/j.jorganchem.2003.11.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Cypryk M, Kurjata J, Chojnowski J. Tertiary trisilyloxonium ion in cationic ring-opening polymerisation of a model cyclic siloxane, octamethyl-1,4-dioxatetrasilacyclohexane. J Organomet Chem 2003. [DOI: 10.1016/s0022-328x(03)00452-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Chojnowski J, Cypryk M, Fortuniak W, Kaźmierski K, Rózga-Wijas K, Ścibiorek M. Controlled Synthesis of All Siloxane-Functionalized Architectures by Ring-Opening Polymerization. ACTA ACUST UNITED AC 2003. [DOI: 10.1021/bk-2003-0838.ch002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Affiliation(s)
- J. Chojnowski
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90—363 Łódź, Poland
| | - M. Cypryk
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90—363 Łódź, Poland
| | - W. Fortuniak
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90—363 Łódź, Poland
| | - K. Kaźmierski
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90—363 Łódź, Poland
| | - K. Rózga-Wijas
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90—363 Łódź, Poland
| | - M. Ścibiorek
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90—363 Łódź, Poland
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